أو الاخطاء الاملائيه وجزاكم الله خيرا
TECHNICAL DESCRIPTION:
Keyboard
Keyboard is a set of keys on type writer. It is device used to enter information in to computer. Computer Keyboard has more keys than typewriter key board. Most of these key do special tasks.
The keyboard's overall length is 19 inches. The body of the keyboard, basically rectangle in shape, it is made from plastic. The most key in the keyboard are1.5 inches, it are cube in shape. There are same key are rectangle in shape such as (Tab, capes lock, shift , backspace, and shift)
How keyboard works?
When you press on the key on the keyboard , the scan code bios to the memory (Ram) , then it will be written in the Screen
The most keyboards are between Arabic and English writer. You can change the languish from Arabic to English when you used Alt + Shift key in the right hand in the key board, or used Alt + Shift key in the left hand to change from English to Arabic .
Key board consists of Fifth parts:
First: the machine-like writer Typewriter Area:
The keys are similar in this region keyboards typing. It has between 34 keys of Letters. They are 0.5 inches it are cube in shape.
Second: Numeric Keypad Area:
A computer keyboard also has numerical keys in keyboard to help users enter numbers quickly.
It includes numbers besides keys basic math operations.
Third: Function Keys:
There are 12 key functional highest keyboard. These keys have different functions depending on the programs used on computer. For example, key F1 used to obtain Help.
Fourth: Cursor Movement Keys:
Four keys are used to move the directory to write four directions.
Fifth: Special Keys:
Enter key it is L in shape. The transition to a new line of word processing applications in Windows.
Backspace key: it is 1.5 inches. It is rectangle in shape. It is used to deleting one letters on the left index write.
Key ESC: It is 0.5 inches .It is cube in shape; it is used in many applications to cancel the process.
Key Page Up: used by some applications to reach the top of the page.
Key Page Down: used by some applications to reach the bottom of the page.
Key Print Screen: used in the printing of the s of the image on the screen can paste applications in image processing.
